Pre-trial judges have ruled Libyan authorities are "willing and able" to prosecute former intelligence chief Abdullah al-Senoussi for alleged crimes against humanity over the murder and persecution of protesters in the early days of the uprising that eventually toppled Gaddafi in 2011.

Under international law, a country has the first right and obligation to try suspected war crimes cases at home.

Earlier, judges had resisted remanding the cases of al-Senoussi and Gaddafi's son Saif al-Islam, saying Libya's legal system wasn't stable enough. Both men are being held in Libya.